print("%020.3f" % (12.8))

a="动脑学院"
bytes_a=a.encode("utf-8")
print(bytes_a,type(bytes_a))

str="___"
seq=("hello","动脑","pythonvip")
print(str.join(seq))

P="    你好，动脑eric   "
print(P.strip(" "))

zhangsan=" 张三         dnpy_100    22     "
